Baby now weighs over 12.7 ounces and is a little larger than 10 1/2 inches long, or about the length of a banana! Your baby will continue to grow at a remarkable pace as you continue your pregnancy week by week. By 21 weeks, your baby's growth has slowed somewhat though your baby is still growing and developing at a remarkable pace. Your baby's skin, organs and central nervous system continue to develop and mature.
Though not fully matured, your baby's digestive system is also working at 21 weeks pregnant. The intestines are slowly starting to contract and relax, and your baby is able to swallow and absorb fluids through the amniotic fluid.
Though it seems unusual that your baby swallows amniotic fluid, this actually helps mature the digestive system.
At some point in your pregnancy, you might start noticing that your baby has started hiccupping. Believe it or not, hiccupping in utero is actually quite common. Fetal hiccups typically begin sometime during the second trimester. You may notice hiccups as a small, repetitive and rhythmic movement that occurs for a few minutes at a time in your belly.
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